Implementations/suggestions for Multihoming IPv6 for DSL sites

Joe Maimon jmaimon at
Fri Apr 8 13:54:39 UTC 2011

Owen DeLong wrote:
> On Apr 7, 2011, at 8:13 PM, Tom Limoncelli wrote:
>> On Thu, Apr 7, 2011 at 10:51 PM, Owen DeLong<owen at>  wrote:
>>> There is no need for NAT in order to multiple-home. BGP is every bit as effective and much simpler.
>> I know a lot of small businesses with one FiOS link and one Comcast
>> link and I don't think they're going to be able to do BGP. Their
>> providers won't do it and their prem equipment doesn't support it and
>> the local IT person doesn't have the know-how to do it.  I know that
>> the typical NANOG member isn't in this category, but this is a
>> use-case that is very common and outnumbers NANOG members.
> I have one DSL and one Cable. Neither the DSL provider nor Comcast
> will do BGP. I do BGP just fine without them doing BGP.
> Owen

Your use case requires at minimum a triangle, ideally a rectangle.

Along for the ride comes encapsulation, overhead, additional bottlenecks 
and failure scenarios. The payoff has to be worth it and that usually 
means something more than the elimination of napt on outbound internet 
access, such as inbound access to bring-your-own-ip.

For anyone to do this requires beyond basic know-how and a willing 3rd 
point. I'll do it for a customer, but it is by no means readily 
available, or even ideal, so lets stop hyping it.


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